Locomotive-fire-box construction.



LE GRAND PARISH.

LOGOMOTIVE FIRE BOX CONSTRUCTION.

APPLICATION FILED MAX--15; 1914.

PatentedJan. 19, 1915.

30 freely and readily inserted and removed for purposes of repair, replacement LE GRAND PAEISH,'OF NEW 'YUEK, N. Y.

igiaaaee.

LOCOMOTIVE-FIRE BOX CONSTRUCTION.

Specification of Letters Patent.

Patented Jan, is, was.

Application filed May 15, 1914. Serial no. 838.652.

To all whom it may concern:

Be it known that T, LE GRAND PARISH, a

citizen of the United States, residing at New York city, in the county of New York and State of New York, have invented certain new and useful lnprorements in Locomotive-Fire-Box Construction, of which the following is a specification.

bricks constituting This invention has reference to locomotive fire-box constructions and it relates particutube sheet 4?, and the usual outside side sheets (not shown). The water spaces at the front, sides and rear of the fire-box are closed by .the usual mud ring 5, the back sheets are connected together by means of. the stay bolts 6, while the cover and crown sheets are connected by radial stay bolts 7.

I In the front of the fire-box is the usual flue 'larly to an improved arrangement of an arch f or bafie wall in conjunction with a plurality.

of circulation tubes whereby refractory the arch may be so arranged as to obtain more perfect and complete'combustion by'securing the intimate admixture of the gases cit combustion, while atthe same time the benefits of increased circulation are obtained. This invention is a specific embodiment of the generic inventron shown and described in-my co-pending application Serial No. 755,418, filed March 19, 1913, and relates to an arrangement of the refractory bricks in a continuous but irregular profile. My invention also contemplates a construction having the characteristics specified but which is adapted for use in I connection with standard types of locomomgs', whereintive fire-box constructions, and which is so arranged that the bricks of the arch can be or inspection. The foregoing, together with s'uch other objects as may hereinafter appear or are incident to my invention T attain by means of a construction which T have illustrated in preferred form in the accompanying drawl igure 1 is a longitudinal section through the locomotive fire-box showing the applica- 1 tion of my improvement-thereto; Fig. 2 is a cross section through the box taken on the line Ill-H of Fig. 1 butdrawn on a larger scale: 'Fig. 3 is a cross section similar to that of Fig. 2 butshowing a slightly modified I arrangement of the arch; and Fig. 4 is a longitudinal section through another modification of my invention.

On inspection of Fig. 1, it will be seen that I have illustrated a fire-box of standard.

construction, said box comprising an inner fire-box composed of the tube' sheet 1, side sheets 2, a back sheet 3, a crown sheet 4, and an outside composed of a'throat sheet i and back sheet 3, a cover or sheet 13 in which the rear ends ofthe flues 12 are expanded.

Referring now to those features of my invention which are departures from the usual, form of construction, it will be seen that T. have provided a plurality of arch supporting members, preferably circulation tubes, which are arranged intwo rows 8 and 8, the tubes ot-one row being substantially parallel with the tubes of the other row, and preferably directly above they tubes of the other row; as in the construction of the aforesaid co-pending application. I The refractory arch or bafiie wall in the present construction presents a continuous but irregular surface to the products of combustion. The arch is .located at the forward end of the fire-box extending from a point adjacent the tube sheet 1 a portion of the distance to the rear or back sheet of the box.

In the construction shown in Fig. 2, the

central row of arch bricks 9 are socketed, on

the central tubes of the lower row 8, and the proximate rows of bricks 10 and 11 are socketed at their inner ends on said tubes, while they are socketed at their opposite ends on the outermost tubes of the upper row 8. The rows of bricks 9, 10,- and 11 constitute the central refractory wall, and

the side walls are composed of rows'ofbricks what to a crown. In this construction, the central row of bricks 9 are supported on the central tubes of the upper row 8. The rows of bricks 10 and 11 aresupported at their inner ends on said tubes and at their" opposite ends on the outermost tubes of the lowerrow 8, inclining dewnwardly toward the Side sheets. comprised by these rows of tubes will be thus seen to be somewhat in the form of a crown; The rows of M and lacon- The central refractory arch' stituting the side walls of the arch are supported at their inner ends on the outermost tubes of the lower row 8 and preferably incline upwardly to engage the. side sheets 2.

-It will be apparent from the foregoing that -in both types of the improvement shown, the profile of the arches is irregular and so shaped as to provide in efl'ect What may be termed pockets or mixing chambers, which secure an intimate admixture of, the hot gases, while at the same time the flow of the gasesis not retarded to any appreciable extent. The form of arch imparts a motion to the gases which secures the admixture referred to, and thus obtains more perfect or complete combustion of the gases, thereby increasing the general efficiency of the fire-box. It is also to be observed that if desired, the form of Fig. 3 could be used nearest the flue sheet to providemore room for the fire where the tubes are nearer to the rate and the form of Fig.

2 could be used or a portion of the arch nearest to the door (see'Fig. 4:), and by this arrangement an intermediate opening would be provided which would facilitate the mixing oi the gases. It will be seen that in conjunction with the benefits obtained by the improved arrangement of the arch, I also'obt'ain the benefits of increased circulation which is incident to the provision of the additional circulation tubes, and it will also be apparent that in each form of construction, a portion of the circulation tubes'either receive the beneficial action of the bricks or are protected from direct contact with the intense heat of the fire. From the foregoing, it-will therefore be seen that the construction is economical, while at the same time it is such as provides "free access not only for the purpose of insertion, removal or replacement of the bricks forming the arch, but also for the inspection and repair of the flue sheet. and the stay bolts, which is of great importance.

While the construction is such as to se cure the benefits hereinbefore mentioned, nevertheless the bricks are firmly and securely supported so that they are not liable to be misplaced under service conditions. The individual bricks employed in building u the arches may be made of uniform size, 1' desired, and the relative position of the various circulating tubes slightly varied so as to provide proper support for the bricks.

I claim 2-- 1. A locomotive fire-box comprising in messes combination water walls, side sheets, a plurali ty of circulating tubes connecting water walls and extending in planes which are spaced apart substantially vertically, and a refractory arch comprising a central row of bricks supported at the ends on tubes in substantially the same plane, a row-0f bricks 2. In a locomotive fire box, the combina tion of two series of arch brick supporting members arranged in two planes one above the other, and a refractory arch comprising a plurality of arch bricks havingbearing surfaces at the ends arranged so that the central brick may be supported on either the upper or, lower series and he remaining bricks supported with respect to the central brick to form a continuous arch.

3. In a locomotive fire box, the combination of two series of arch brick supporting members arranged in'two planes one above the other, and a refractory arch comprising a central row of bricks having supporting sockets whereby said bricks may be supported on either series of supportin incinbers, and side rows of bricks also %1'aving supporting sockets whereby said bricks may be supported on said members with respect to the central row of bricks to form a continuous arch.

4. in a' locomotive fire box, the combination of two series of arch brick supporting 'members arranged in two planes with the members of one plane lying substantially above the members of the other plane, and a plurality of bricks having supporting sockets adapted to engage said members, and having their edge portions adjacent said sockets cut away whereby a brick may be supported on any pair of adjacent supporting members in the same plane and the remaining bricks supportedin relation thereto to form a continuous arch. In testimony whereof I have hereunto signed my name in the presence of the two subscribed Witnesses.

LE GRAND PARISH. Witnesses:

PAUL Srnnns'rvnn'r, HARVEY L. Lncnnnn. 

